Wholesale Motorcycle crankshaft designed for CB190 Supplier, Exporters

For  Honda CG250 Zongshen CG250 underbone motorcycles, It has a cylinder bore of 67mm, a stroke of 53mm, and is a key component for converting piston reciprocating motion into crankshaft rotational motion in 250cc single-cylinder four-stroke engines.

Product Description

Product Overview

Specifically designed for the CG125 motorcycle engine, this connecting rod is typically forged from high-strength steel or alloy, ensuring it can withstand the high stresses and dynamic loads within the engine. It features precision-machined bearing surfaces, a piston pin bore, and a crankshaft journal interface. The rod incorporates a needle bearing (or bush) at the piston pin end for reduced friction and wear. Its design adheres to strict dimensional and structural standards, making it a direct replacement for the OEM component. Whether for engine maintenance, rebuilds, or performance upgrades, this connecting rod delivers reliable performance, durability, and compatibility with the CG125's engine architecture.

Key Advantages
  • High-Strength Construction: Forged from premium steel/alloy, it resists bending, cracking, and deformation under extreme engine loads, ensuring long-term reliability.
  • Precision Engineering: Machined to exact tolerances, it ensures proper alignment between the piston and crankshaft, minimizing vibration and optimizing engine efficiency.
  • Efficient Friction Reduction: The integrated needle bearing (or bush) at the piston pin end reduces friction, enhancing wear resistance and extending the component's service life.
  • Seamless Compatibility: Designed specifically for CG125, it fits perfectly with the piston, crankshaft, and other engine parts, enabling easy installation and restoring factory-like performance.
Applications
  • CG125 Engine Rebuilds: Essential for restoring engine functionality when replacing worn or damaged connecting rods during full engine overhauls.
  • Routine Maintenance & Repairs: Used to address issues like rod wear, misalignment, or bearing failure in CG125 engines.
  • Aftermarket Performance Upgrades: A foundational component for engine modifications (e.g., bore-up kits, high-compression builds) on CG125-based engines.
  • OEM Replacement in Manufacturing: Utilized by motorcycle manufacturers or assemblers for new CG125 production or engine component replacements.
Product Specification
Specification Item Details
Model Compatibility CG125 motorcycle engine
Material Forged steel (standard); Alloy steel (performance variant)
Piston Pin Bore Diameter Matches CG125 piston pin size (typically 15mm)
Crankshaft Journal Fit Precision-machined to match CG125 crankshaft journal dimensions
Bearing Type (Piston End) Needle roller bearing (common) or bronze bush
Weight Approx. 200-250g (varies by material and design)
Operating Temperature Up to 200°C (under normal engine operation)
Service Life Up to 30,000-40,000 km (varies with maintenance and riding conditions)
Certification Complies with motorcycle engine component quality standards
Frequently Asked Questions
What materials are used to manufacture the CG125 connecting rod?
It is forged from premium steel or alloy steel to withstand high stresses and dynamic loads.
What is the typical service life of this connecting rod?
Under normal maintenance and riding conditions, it has a service life of up to 30,000 to 40,000 km.
Can this connecting rod be used for performance upgrades?
Yes, it is suitable for aftermarket performance upgrades, including bore-up kits and high-compression engine builds on CG125-based engines.
What type of bearing is integrated into the piston pin end?
It typically features a needle roller bearing or a bronze bush to reduce friction and wear.
Is this connecting rod compatible with OEM specifications?
Yes, it is designed strictly to dimensional and structural standards, making it a direct replacement for the OEM CG125 component.
What is the operating temperature limit for this component?
It is designed to operate reliably at temperatures up to 200°C under normal engine operation.

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